Photovoltaic field box-type substation foundation structure

Abstract

The utility model provides a photovoltaic field box-type transformer station base structure. The photovoltaic field box-type transformer station base structure comprises a base plate with a communication hole; the side wall plate is fixedly connected with the side edge of the bottom plate; the end wall plate is fixedly connected with the end part of the bottom plate and the side wall plate; the oil collecting pit is formed in the outer side of the side wall plate; the connecting positions of the bottom plate and the side wall plates and the connecting positions of the bottom plate and the end wall plates are subjected to waterproof treatment. According to the scheme of the utility model, the photovoltaic field box-type substation foundation structure which is stable in structure and good in integrity can be provided.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic power generation, in particular to a foundation structure of a box-type substation in a photovoltaic field. Background Art

[0002] A box-type substation, also known as a prefabricated substation or prefabricated transformer substation, is a high-voltage switchgear, a distribution transformer, and a low-voltage distribution device. It is a factory prefabricated indoor and outdoor compact distribution equipment arranged according to a certain wiring scheme, that is, functions such as transformer step-down and low-voltage power distribution are organically combined together and installed in a moisture-proof, rust-proof, dust-proof, mouse-proof, fire-proof, anti-theft, heat-insulated, fully enclosed, movable steel structure box, which is especially suitable for the construction of photovoltaic fields and is a brand-new substation that emerged after the civil construction substation.

[0003] Due to the particularity of its own construction content, photovoltaic projects often have characteristics such as small building volume, light self-weight, and simple form. Its stability problems are different from those of traditional building projects. The box substation foundation structure is the main structure in the photovoltaic field, and it mainly has engineering characteristics such as small volume, light self-weight, and strong allowable deformation ability. At present, the foundation structure of the box-type substation needs to take corresponding measures for problems such as the settlement mechanism of the construction foundation, the evaluation of ground stability, the deformation and protection of buildings. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a foundation structure of a box-type substation in a photovoltaic field, which has a stable structure and good integrity.

[0005] To solve the above technical problem, the technical solution of the utility model is as follows:

[0006] A foundation structure of a box-type substation in a photovoltaic field, comprising:

[0007] A bottom plate with a communication hole;

[0008] Side wall panels fixedly connected to the side edges of the bottom plate;

[0009] End wall panels fixedly connected to the ends of the bottom plate and the side wall panels;

[0010] An oil sump arranged outside the side wall panels;

[0011] Wherein, the joints of the bottom plate with the side wall panels and the end wall panels are all subjected to waterproof treatment.

[0012] Optionally, the side wall panels are fixedly connected to the bottom plate through bolt connectors.

[0013] Optionally, the bolt connector includes: a square card member with an opening on one side; a reinforcing bar penetrating through the bottom of the side wall panel; a steel wire fixedly arranged inside the bottom plate.

[0014] Optionally, a thread is cut on the top of the inserted bar.

[0015] Optionally, the side wall panel is fixedly connected to the end wall panel through a threaded sleeve.

[0016] Optionally, the contact surfaces of the bottom plate with the side wall panel and the end wall panel are rough surfaces, and grooves are provided on both the inner and outer sides of the bottom plate.

[0017] Optionally, a grille is provided at the top opening of the oil sump.

[0018] Optionally, a gravel layer is laid at the bottom of the oil sump.

[0019] Optionally, the bottom plate or the side wall panel is formed by lap joint of a first flat plate and a second flat plate in a rabbet manner, and the convex part of the first flat plate is aligned with the concave part of the second flat plate and then fixedly connected.

[0020] Optionally, the rabbet is sealed with self-compacting concrete.

[0021] The above solution of the present utility model provides a foundation structure for a box-type substation in a photovoltaic field, including: a bottom plate with a communication hole; side wall panels fixedly connected to the sides of the bottom plate; end wall panels fixedly connected to the ends of the bottom plate and the side wall panels; an oil sump arranged outside the side wall panels; wherein, waterproof treatment is carried out at the joints of the bottom plate with the side wall panels and the end wall panels. The foundation structure of the box-type substation in the photovoltaic field is stable and has good integrity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a top view of the foundation structure of the box-type substation in the photovoltaic field of the present utility model;

[0023] Figure 2 is a side view of the foundation structure of the box-type substation in the photovoltaic field of the present utility model;

[0024] Figure 3 is a schematic diagram of the wall panel of the foundation structure of the box-type substation in the photovoltaic field of the present utility model;

[0025] Figure 4 is a splicing diagram of the wall panels of the foundation structure of the box-type substation in the photovoltaic field of the present utility model;

[0026] Figure 5 is a connection diagram of the bottom plate and the side wall panel of the foundation structure of the box-type substation in the photovoltaic field of the present utility model;

[0027] Figure 6 is a connection diagram of the side wall panel and the end wall panel of the foundation structure of the box-type substation in the photovoltaic field of the present utility model.

[0028] Description of the reference numerals:

[0029] 1 - Bottom plate; 2 - Side wall panel; 3 - End wall panel; 4 - Oil sump; 5 - Bolt connector; 51 - Square clip; 52 - Inserted reinforcement; 53 - Steel wire; 6 - Threaded sleeve; 7 - Grating; 11 - First flat plate; 12 - Second flat plate. Detailed implementation manners

[0030] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0031] As Figure 1 , Figure 2 shown, an embodiment of the utility model provides a foundation structure for a photovoltaic field box-type substation, including: a bottom plate 1 with a communication hole; a side wall panel 2 fixedly connected to the side of the bottom plate 1; an end wall panel 3 fixedly connected to the end of the bottom plate 1 and the side wall panel 2; an oil sump 4 arranged outside the side wall panel 2; wherein, waterproof treatment is carried out at the joints of the bottom plate 1 with the side wall panel 2 and the end wall panel 3.

[0032] In this embodiment, as Figure 1 , Figure 2 shown, the foundation structure of the photovoltaic field box-type substation includes: a bottom plate 1, a side wall panel 2, an end wall panel 3 and an oil sump 4; wherein, the bottom plate 1 has a communication hole for laying the connection cables of the box-type substation, and the wiring pipeline can also be embedded through the communication hole to protect the connection cables from being damaged easily; two sides of the bottom plate 1 are fixedly connected with side wall panels 2. As Figure 3 shown, the side wall panels 2 on both sides have the same structure, and ventilation holes are arranged on the side wall panels 2; two ends of the bottom plate 1 are fixedly connected with end wall panels 3, and the end wall panels 2 at both ends have the same structure; the side wall panels 2 and the end wall panels 3 are arranged around the bottom plate 1 together, and the plates are connected to each other to form a closed-loop space; an oil sump 4 is arranged outside the side wall panel 2, and the oil sump is used to collect the oil of the transformer in special cases; waterproof treatment is carried out at the joints of the bottom plate 1 with the side wall panel 2 and the end wall panel 3 to ensure the waterproof effect of the whole foundation structure; a gravel layer can also be arranged at the bottom of the foundation structure to reduce the influence of uneven settlement within the foundation range.

[0033] Above the oil sump 4 is for placing a transformer. In this embodiment, the oil sump 4 is integrally and closely arranged with the foundation of the box-type substation, which can make the distances between various main equipment of the box-type substation close after installation. The distances between various equipment are very important for the box-type substation because there are a large number of cables connected between the equipment. If the equipment is spaced far apart, the probability of a large settlement difference occurring in the foundation of a single equipment is relatively high, posing a risk of damaging the cables and affecting the power output of the entire photovoltaic field. Therefore, the foundation structure of the box-type substation is optimized to make the main equipment of the box-type substation rest on a relatively close foundation as much as possible, with little difference in additional stress, and the probability of a large settlement occurring in a single equipment is relatively low. The solution provided in this embodiment makes the foundation structure of the box-type substation have strong integrity, be structurally compact and stable, and can ensure the safe operation of the photovoltaic field.

[0034] As Figure 5 shown, in an alternative embodiment of the present utility model, the side wall panel 2 is fixedly connected to the bottom plate 1 through a bolt connector 5.

[0035] In this embodiment, as Figure 5 shown, the side wall panel 2 and the bottom plate 1 are fixedly connected through a bolt connector 5, wherein the bottom end of the bolt connector 5 is embedded inside the bottom plate 1, and the top end of the bolt connector 5 is embedded inside the side wall panel 2. During installation, the embedded parts are tightened and fixed with bolts; the connection contact surface between the side wall panel 2 and the bottom plate 1 is waterproofed with waterproof rubber strips and waterproof slurries.

[0036] As Figure 5 shown, in an alternative embodiment of the present utility model, the bolt connector 5 includes: a square card member 51 with an opening on one side; a reinforcing bar 52 penetrating through the bottom of the side wall panel 2; and a steel wire 53 fixedly arranged inside the bottom plate 1.

[0037] In this embodiment, as Figure 5 shown, the bolt connector 5 includes: a square card member 51, a reinforcing bar 52, and a steel wire 53. Among them, the square card member 51 is a square frame with an opening on one side, and the square card member 51 is pre-embedded inside the side wall panel 2; the bottom end of the steel wire 53 is pre-fixed inside the bottom plate 1, and the top end of the steel wire 53 extends out from inside the bottom plate 1, and the exposed part is fixedly connected to the reinforcing bar 52; a round hole through which the reinforcing bar 52 can pass is provided at the bottom of the square card member 51, and this round hole extends through the bottom of the side wall panel 2 all the way; during use, first pass the reinforcing bar 52 and the steel wire 53 through the round hole, make the top of the reinforcing bar 52 enter the inside of the square card member 51, and then fix the top of the reinforcing bar 52 on the square card member 51, and through the traction of the steel wire 53, the bottom plate 1 and the side wall panel 2 are firmly fixed together.

[0038] In an alternative embodiment of the present utility model, the top of the reinforcing bar 52 is threaded.

[0039] In this embodiment, the top of the inserted bar 52 is provided with thread cutting. The thread cutting enables the inserted bar 52 to be fixed by means of a bolt. During use, the top of the inserted bar 52 passes through the reserved round hole in the side wall panel 2, so that the thread cutting at the top of the inserted bar 52 is exposed in the square clamping part 51. Then, a nut is used to install on the thread cutting at the top of the inserted bar 52, and the nut is tightened, thereby tightening the steel wire 3, firmly fixing the inserted bar 52 on the square clamping part 51, and at the same time tightly fixing the bottom plate 1 and the side wall panel 2.

[0040] As Figure 6 shown, in an alternative embodiment of the present utility model, the side wall panel 2 is fixedly connected to the end wall panel 3 through a threaded sleeve 6.

[0041] In this embodiment, as Figure 6 shown, the inner wall of the threaded sleeve 6 is provided with threads. The threaded sleeve 6 is pre-fixed inside the top side of the end wall panel 3. A round hole and a square clamping groove are provided at the position of the side wall panel 2 corresponding to the threaded sleeve 6. The square clamping groove can keep the outer surface of the side wall panel 2 flat, avoid the bolts protruding from the wall surface, eliminate potential safety hazards, and in addition, the square clamping groove can also protect the bolts and prevent damage and corrosion. During use, first align the round hole at the top of the side wall panel 2 with the threaded sleeve 6 at the top of the end wall panel 3, then insert the bolt into the threaded sleeve 6 through the square clamping groove and the round hole, and rotate and tighten the bolt, so as to firmly fix the side wall panel 2 and the end wall panel 3. The contact surface between the side wall panel 2 and the end wall panel 3 is waterproofed with a waterproof rubber strip.

[0042] In an alternative embodiment of the present utility model, the contact surfaces of the bottom plate 1 with the side wall panel 2 and the end wall panel 3 are rough surfaces, and grooves are provided on both the inner and outer sides of the bottom plate 1.

[0043] In this embodiment, the contact surfaces of the bottom plate 1 with the side wall panel 2 and the end wall panel 3 are specially provided rough surfaces. The rough surfaces can increase the friction force of the contact surfaces to prevent relative sliding between the plates. Grooves are opened on both the inner and outer sides of the bottom plate 1 for embedding waterproof rubber strips. During use, first install the waterproof rubber strips in the grooves, level them by grouting and then install the wall panels. The installation method of this embodiment can enhance the integrity and waterproof performance of the entire foundation structure.

[0044] In an alternative embodiment of the present utility model, a grille 7 is provided at the top opening of the oil sump 4.

[0045] In this embodiment, as Figure 1 shown, the top of the oil sump 4 is provided with an opening, and a grille 7 is provided at the opening. The oil sump 4 is used to place a transformer on it. The grille 7 is provided to facilitate the transformer oil to flow to the oil sump under the transformer through the grille 7 when a fire or other failures occur to the transformer, preventing greater accidents.

[0046] In an alternative embodiment of the present utility model, a gravel layer is laid at the bottom of the oil sump 4.

[0047] In this embodiment, as Figure 2 shown, a gravel layer is laid at the bottom of the oil sump 4; the gravel layer is on the surface of the bottom plate of the oil sump 4. If the transformer fails and leaks oil, the transformer oil can seep into the gravel layer through the grid 7. Due to the large-area contact with the gravel layer, the temperature of the oil is reduced, avoiding fire; in addition, a part of the oil sump 4 is below the ground level, greatly reducing the height of the transformer box body, making it convenient and flexible to connect with high- and low-voltage components and being less affected by the external environmental temperature.

[0048] As Figure 4 shown, in an alternative embodiment of the present utility model, the bottom plate 1 or the side wall panel 2 is formed by lap joint of the first flat plate 11 and the second flat plate 12 in a rabbet manner, and the convex part of the first flat plate 11 is aligned with the concave part 12 of the second flat plate and then fixedly connected.

[0049] In this embodiment, as Figure 4 shown, the bottom plate 1 and the side wall panel 2 can be formed by splicing multiple flat plates, and the splicing method adopts the rabbet connection method; specifically, the bottom plate 1 or the side wall panel 2 is formed by lap joint of the first flat plate 11 and the second flat plate 12 in a rabbet manner. After the convex part of the first flat plate 11 is aligned with the concave part 12 of the second flat plate, they are fixed together with bolts and steel plates; this connection method can achieve the firm connection of the splicing plates. In addition, the rabbet and the steel plate above it extend the water seepage path, which is beneficial to improving the waterproof ability at the splicing joint.

[0050] In an alternative embodiment of the present utility model, the rabbet is sealed with self-compacting concrete.

[0051] In this embodiment, after the rabbet is fixed with bolts and steel plates, self-compacting concrete is used to seal the rabbet interface to increase the firmness and waterproofness of the rabbet.

[0052] The foundation structure of the box-type substation of the present utility model adopts a cast-in-place reinforced concrete box-shaped foundation structure or a strip foundation structure with better integrity, and is configured with an appropriate amount of crack-resistant steel bars to resist the cracks caused by uneven settlement, ensure the integrity of the foundation structure, and reduce the impact on the upper electrical equipment. The box-type substation device is exposed to the sun all year round, which will cause the phenomenon of abnormal high temperature inside the box. For example, during the high-temperature stage in summer, the temperature inside the box-type substation can be as high as about 60 °C, which will seriously affect the performance of the electrical equipment and even affect the service life of relevant electrical equipment components. In this regard, in order to effectively achieve the cooling effect, the ventilation and cooling are refined and designed, and the ventilation holes of the wall panel are increased. The foundation structure of the box-type substation of the photovoltaic field using the solution of the present utility model can provide guarantee for the safe operation of the photovoltaic field.

[0053] The above are the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A photovoltaic field box-type substation infrastructure, characterized in that: include: A bottom plate (1) with a communicating hole; A side wall plate (2) fixedly connected to the side edge of the bottom plate (1); An end wall panel (3) fixedly connected to the end of the bottom panel (1) and the side wall panel (2); An oil collecting pit (4) arranged outside the side wall plate (2); Wherein, the connection points between the bottom plate (1) and the side wall plate (2) and the end wall plate (3) are all waterproofed.

2. The photovoltaic field box-type substation infrastructure according to claim 1 is characterized in that: The side wall plate (2) is fixedly connected to the bottom plate (1) via a bolt connector (5).

3. The photovoltaic field box-type substation infrastructure according to claim 2 is characterized in that: The bolt connector (5) comprises: a square clamp (51) with an opening on one side; a dowel (52) penetrating the bottom of the side wall plate (2); and a steel wire (53) fixedly arranged inside the bottom plate (1).

4. The photovoltaic field box-type substation infrastructure according to claim 3 is characterized in that: The top of the inserted reinforcing bar (52) is provided with a thread.

5. The photovoltaic field box-type substation infrastructure according to claim 1 is characterized in that: The side wall plate (2) is fixedly connected to the end wall plate (3) via a threaded sleeve (6).

6. The photovoltaic field box-type substation infrastructure according to claim 1 is characterized in that: The contact surfaces between the bottom plate (1) and the side wall plate (2) and the end wall plate (3) are rough surfaces, and grooves are provided on both inner and outer sides of the bottom plate (1).

7. The photovoltaic field box-type substation infrastructure according to claim 1 is characterized in that: A grille (7) is provided at the top opening of the oil collecting pit (4).

8. The photovoltaic field box-type substation infrastructure according to claim 1 is characterized in that: The bottom of the oil collection pit (4) is paved with a gravel layer.

9. The photovoltaic field box-type substation infrastructure according to claim 1 is characterized in that: The bottom plate (1) or the side wall plate (2) is formed by overlapping a first flat plate (11) and a second flat plate (12) in a tongue-and-groove manner, and the convex portion of the first flat plate (11) is aligned with the concave portion of the second flat plate (12) and then fixedly connected.

10. The photovoltaic field box-type substation infrastructure according to claim 9, characterized in that: The tongue and groove are sealed by self-compacting concrete.

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